I think there's a lot more chances for new iMac than new Mac Mini at WWDC. Apple doesn't seem interested in headless Macs anymore.I’m really hoping they release one at wwdc this year: the rumor says that their will be one new desktop with a custom chip. Maybe that could be a Mac Mini. I’d be good with a well spec-ed mac mini. But I’m cautiously optimistic about the idea of a new imac this year. It’s just a waiting game until WWDC. I really wanna get a powerful mac to replace my aging 2015 stock rmbp, and I’ve never had a mac desktop. An iMac would be great, but I’m not going to jump in on a model that’s already a year old.
You do know that Apple is still selling brand new 2015 MBP? It's not old in any ways.